When you state that you are using the 'novopt' option when compiling, what do you mean? Using 'novopt' is highly discouraged and there are better ways to achieve design visibility.
If you are using the recommended 3-step flow, you can use the '+acc' option during the 'vopt' step. If you are using a 2-step flow, you can use '-voptargs=+acc' during the 'vsim' step.
If you can post the commands you are using to compile and simulate along with the exact error message, additional guidance can be provided. Of course, contacting your Mentor support representative is always recommended.
